Podle prohledání nejúplnějšího diskusního fóra o výrobě pervitinu v historii (, archiv Hive) je "šmoulí droga" důsledkem blokátorů histaminu; Loperamidu, Chorfeniminu a loratadinu, které se neodstraňují z pilulek psuedoefedrinu ( případně i celých pilulek protřepat a upéct) a použití železa nebo mědi může způsobit, že je zelenavě zbarvený 
- By DirkDiggler
Jak mohu vyčistit Pilulky od toho ?
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- By mycelium
Cant a substance called norite (spelling)?
On the corner of Haight and Masonic Street at 2am, one of the chemists of the family told me how to clean amber or lavender crystal into white using norite to absorb color
I don't know why he told me, he was rambling, but I never forgot it, or him, and saw him at RFK stadium the next year with hair cut and no beard, a hat and sunglasses, all incognito,
On the corner of Haight and Masonic Street at 2am, one of the chemists of the family told me how to clean amber or lavender crystal into white using norite to absorb color
I don't know why he told me, he was rambling, but I never forgot it, or him, and saw him at RFK stadium the next year with hair cut and no beard, a hat and sunglasses, all incognito,
